What was found
INTERCOSTAL AT DD3 CENTER HAS CORROSION AROUND LIGHTNING HOLE. (C-CHECK RO 2/26/2023) REPLACED WITH NEW SERVICEABLE DD3 INTERCOSTAL (P/N 601R31056-1S) ONTO PAX DOOR USING ALL NEW FASTENERS. REF BOMBARDIER DWG# 601R31702 REV N AND CRJ200 SRM 51-42-06 REV 39, DATED: MAR 10/21 AND CRJ 200 SRM 51-42-21 REV 39, DATED: MAR 10/21., M337 AND SKYWEST TASK CARD 51-900-1003 SKY COMPLIED WITH. SEE CONTINUE CARD FOR DETAILS.